Never Lose Anything
The Protag Duet tag is so smart that it cannot only alert you that you’ve left your phone behind, but your bag as well. Inside the plastic tag is an RFID chip, speaker and just enough electronics to sound the alarm when it and your phone get separated. Plus, it can find your phone, either by pressing Duet to make the phone ring – even if the phone is set to silent – or by tracking its location. The $29 device works with Android and iPhones.